Leptotrichia spp. An anaerobe with a distinct Gram stain. Gram negative (but often variable). Leptotrichia spp are oral flora that divide into long "pencil-like" morphology (think two pencils touching eraser ends). Rich Davis, PhD, D(ABMM), MLS @richdavisphd #Leptotrichia #microscopy #clinical #microbiology
